JPS6025704A - Manufacture of dyed veneer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for producing a dyed veneer used for producing an artificially decorated t1χ board.

(Background technology) Wood resources are beginning to be depleted, and decorative wood veneers with luxurious wood grains and colors are becoming scarce.For this reason, low-grade wood is bleached, dyed, laminated and laminated, and the resulting laminated flitch is produced. Artificially decorated veneers are obtained by slicing.In order to obtain such artificially decorated veneers, bleaching and dyeing are performed as described above.In addition, the drawbacks of high-quality materials can be solved by bleaching and dyeing. Various countermeasures have been taken to compensate for this.

But 1. Conventionally, disadvantageous bleaching and dyeing are wood +, t-tp
- The method involved immersing the plate in a bleaching solution or a dyeing solution, which had the following drawbacks. However, depending on the tree species, wood itself has a filling property (for example, density 9
There is considerable variation in strength, permeability, water absorption, etc.). This variation in physical properties is due to the fact that when a wood veneer is immersed in a bath, these liquids may be inside the wood.
This does not significantly affect the degree of penetration. Fumari,
The moisture content and color after bleaching and bleaching correspond directly to variations in physical properties, resulting in large fluctuations. Therefore, it has been difficult to express wood grain patterns and colors that give a sense of luxury.

[Purpose of the invention]

This invention was made in view of these circumstances, and utilizes a method for producing dyed veneer that is less susceptible to variations in wood physical properties and can reduce variations in moisture content and color after dyeing. The purpose is to provide.

[Disclosure of the invention]

The inventors conducted extensive studies to achieve the above object.

As a result, this invention has been completed.When bleaching and dyeing Kizukiguruma treatment, a certain amount of decolorizing liquid is uniformly applied to the wood veneer to decolorize it, and then a certain amount of dye liquid is applied to the wooden veneer. Its gist is a method for manufacturing dyed veneer, which is characterized by uniformly coating and dyeing. This invention will be explained below. This invention employs coating-type decolorization and coating-type dyeing in which the amount of liquid deposited can be adjusted arbitrarily and accurately. By doing so, it is affected by variations in the physical properties of the wood, and the resulting dyed veneers are affected by variations in moisture content and color. I'm trying to reduce the variation.

Specifically, a certain amount of decolorizing liquid is applied to a wood veneer using a brush, a roll coater, etc. so that the thickness is uniform over the entire surface. After this, the decolorized veneer is cured by steaming or the like.Next, a certain amount of the desired staining solution is applied to the veneer using a brush, roll coater, etc., so that the stain is uniform over the entire surface, as in the decolorization process. Temporarily apply decolorized i1'L using .

After this, the veneer is cured using a stencil or the like to obtain a dyed veneer.

In this way, by applying a certain amount of the decolorizing liquid and the staining liquid to a uniform thickness over the entire surface, the present invention prevents Lj from penetrating beyond the extent that both the decolorizing liquid and the dyeing liquid are applied. This] C4A physical properties (especially density,
Even if there are variations in water absorption, etc., the resulting dyed veneer is not affected in any way, and the variations in water content and color are extremely small. Moreover,
Since the variation in moisture content is small, drying can be done more evenly.

On the other hand, in the conventional soaking method, when the physical properties of wood are low density and high water absorbency,
Decolorizing solution and staining solution are easily absorbed.

For this reason, the water content increases rapidly, which promotes decolorization and dyeing, but on the other hand, the variation in water content and color also increases.

This invention adopts coating bleaching and coating dyeing, and only needs to satisfy the requirement of uniformly applying a certain amount of bleaching solution and dyeing solution. Conditions such as the method of infiltrating the agent or dye into the interior of the veneer are not particularly limited.

The dyed veneer obtained by this invention can be used as a decorative material such as an artificial decorative veneer by laminating a plurality of sheets and slicing the obtained flitch. Furthermore, the desired color and wood grain texture can be freely changed.

Examples will be described below along with comparative examples.

(Example 1) A decolorizing agent based on 35% hydrogen peroxide was applied uniformly at 150 g/rrr to a 1°0 mm thick agathis veneer with a clear distinction between lot sapwood and heartwood, and the mixture was heated at 60°C. , 10
0%I? After curing for 2 hours in an atmosphere of No. 11, a decolorized veneer was obtained. Furthermore, if this decolorization flj is performed, 0.5% fusion of acidic dye (C, 1, 8 cid Bro + nn 13) 1'Q,
was applied uniformly at 200 g/cd. This was heated to 100°C.
It was cured for 3 hours in an atmosphere of 100% R1+ to obtain a dyed veneer.

The variation in the moisture content of the dyed veneer is (6σn-1
/average value)X100=lO%. Also, the color was very uniform despite the presence of lots, sapwood, core+A, etc.

(Comparative Example 1) A decolorized veneer was obtained by immersing the same agathis veneer as in Example 1 in a 60° C. bath containing 2% hydrogen peroxide as a main ingredient at a bath ratio of 40 for 2 hours. Furthermore, this bleached veneer was dyed with an acid dye (C
, 1,^cid Bro+vn 13) in a 0.1% solution at 98°C for 3 hours to obtain a dyed veneer.

The moisture content variation of the obtained dyed veneer is (6σn-1/
Average value) X 100 = 2596. Also,
The color variation was so great that it was clear to distinguish between lots, sapwood, and heartwood.

〔Effect of the invention〕

The method for producing dyed veneer according to this invention involves decolorizing a wood veneer and dyeing it at °C. After decolorizing the wood veneer by uniformly applying a certain amount of decolorizing liquid to the wood veneer, a certain amount of dye liquid is uniformly applied to the wood veneer. Since the wood is applied to the wood and dyed, it is less affected by variations in the physical properties of the wood compared to the conventional method of bleaching and dyeing by dipping. For this reason, dyed veneers with extremely small variations in moisture content and color can be obtained. Moreover, since the variation in moisture content is small, drying can be done almost uniformly.

Agent: Patent Attorney Takehiko Matsumoto

Claims (1)

[Claims] (11) In bleaching and dyeing wood veneers, a dyeing process characterized by uniformly applying a certain amount of decolorizing liquid to the wood veneer to decolorize it, and then uniformly applying a certain amount of dye liquid to the wood veneer for dyeing. Manufacturing method of veneer.